Some facilities have
more than one image that you will have to choose from when building. In
the future certain planets, or planets with certain stats, will have
different facility images. Example: a planet with a low civilisation
level might have a hut instead of a duracrete personal residence.

Every facility, except for 1x1 Wall, 1x1 Trench, 20x20 Imperial Palace, 1x1 Gate, 1x5 Wall, 1x10 Wall, 1x19 Wall, 20x20 B`omarr monastery, 20x20 Wildlife Preserve, must have roads
on at least two sides in order to separate it from
other facilities. Where two sides of roads meet, the corner piece between
them will be made a road if no facility is present there. The
corner pieces are optional, however, so having a facility occupying one
or more of them will not block construction. At this time roads provide
no bonuses and have no influence on anything other than facility
spacing.

Roads are free to build, they cost nothing and require no materials, and
are built instantly. A piece of road may be destroyed if the facilities
it is adjacent to has roads on at least two other sides. They can be
destroyed by being in the city and going to Production > Facility
Construction > Roads. Anyone who is assigned Administrator or Chief Commissioner of a city can modify roads.

The NPCs who will build the
facility are selected from NPCs of the type Builder who are at your
location, they don't need to be in your party. The NPC foreman will
report to you at critical points in the construction process. If
builders are working on a facility you will be unable to start
construction on another facility if it will occupy the area in which
they are located. Once construction has started you do not need to stay
with the NPCs, they will continue to work on their own. Facilities can
appear to be under construction while having no builders if those
builders have high stealth skills.

The owner of the facility, or a member of
the faction owning the facility with appropriate privileges, may abort
construction of a facility at any time, from any location. When aborting
from the Facility Construction interface in the city there is the option
to return unused materials to a ship, vehicle or facility (of type:
warehouse, hangar, landing pad, factory, mine, recycling plant, silo).
Only one may be selected. If the materials exceed the Weight/Volume
Capacity of the entity the materials that did not fit will be lost. When
construction is aborted the roads built are not removed.

Anything that exists within the construction
site will be moved to your location, or not, according to the following
rules. This only applies to when construction is beginning.

PCs & NPCs:
Builder NPCs who are actively building a facility will not be moved
Ships & Vehicles:
Are not moved if the pilot is an active player and set as the active
pilot
Traveling Entities:
An entity currently moving through the area of the construction site
will block construction. Entities who will be moving through the
construction site but who are not yet within the area will have their
travel aborted.
Descending Entities:
Will block construction until they have descended, at which point they
will fall under the rules regarding Ships & Vehicles

When an NPC working on a construction project is
arrested, killed or otherwise removed from the project the time to
complete the project is recalculated. If all NPCs on a project are no
longer present then construction is halted and the owner of the facility
is informed. They, or the individual who started the construction, must
return to the construction site with more builder NPCs in order to
continue construction. Continuing construction is done from Position
> Actions.

You can also Pause and Resume construction remotely from the Facility
Management page, under "Under Construction".

When you have available NPC builders at your location,
and are on a square that borders a facility currently under
construction (not paused or aborted), you have the ability to add more
builders to the construction project to the maximum of
10builders. This can be performed from the Position > Party interface.